//高度、宽度拓展
.w-full {
  width: 100%;
}
.h-full {
  height: 100%;
}
.w-screen {
  width: 100vw;
}
.h-screen {
  height: 100vh;
}
//flex
.flex {
  display: flex;
}
.flex-1 {
  flex: 1 1 0%;
}
.flex-auto {
  flex: 1 1 auto;
}
.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}
.flex-row {
  flex-direction: row;
}
.flex-col {
  flex-direction: column;
}
.flex-wrap {
  flex-wrap: wrap;
}
.flex-nowrap {
  flex-wrap: nowrap;
}
.items-start {
	align-items: flex-start;
}
.items-end {
	align-items: flex-end;
}
.items-center	{
	align-items: center;
}
.items-baseline {
	align-items: baseline;
}
.items-stretch {
	align-items: stretch;
}
.justify-start {
  justify-content: flex-start;
}
.justify-end {
  justify-content: flex-end;
}
.justify-center {
  justify-content: center;
}
.justif-between {
  justify-content: space-between;
}
.justify-around {
  justify-content: space-around;
}
.justify-evenly {
  justify-content: space-evenly;
}
.content-start {
  align-content: flex-start;
}
.content-end {
  align-content: flex-end;
}
.content-center {
  align-content: center;
}
.justif-between {
  align-content: space-between;
}
.content-around {
  align-content: space-around;
}
.content-evenly {
  align-content: space-evenly;
}
.static {
  position: static;
}
.fixed {
  position: fixed;
}
.absolute {
  position: absolute;
}
.relative {
  position: relative;
}
.sticky {
  position: sticky;
}
// 浮动
.float-right {
  float: right;
}
.float-left {
  float: left;
}
.float-none {
  float: none;
}
.clearfix {
  &:after {
    visibility: hidden;
    display: block;
    font-size: 0;
    content: " ";
    clear: both;
    height: 0;
  }
}
// 元素类型
.block {
  display: block;
}
.inline-block {
  display: inline-block;
}
.inline {
  display: inline;
}
// 颜色bacground-color 、color
.text-black {
  color: #000;
}
.text-white {
  color: #fff;
}
.bg-black {
  background-color: #000;
}
.bg-white {
  background-color: #fff;
}
.line-through {
	text-decoration: line-through;
}
.underline {
	text-decoration: underline;
}
// text拓展
.text-left {
  text-align: left;
}
.text-center {
  text-align: center;
}
.text-right {
  text-align: right;
}
.text-justify {
  text-align: justify;
}
.text-bold {
  font-weight: 700;
}
.rounded {
 border-radius: 50%
}

.flex-a {
	@extend .flex;
	@extend .items-center;
}

.flex-aa {
	@extend .flex;
	@extend .items-center;
	justify-content: space-around;
}

.flex-c {
	@extend .flex;
	@extend .justify-center;
}

.flex-ca {
	@extend .flex;
	@extend .items-center;
	@extend .justify-center;
}

.flex-b {
	@extend .flex;
	@extend .justif-between;
}

.flex-ba {
	@extend .flex-b;
	@extend .items-center;
}

.flex-v {
	@extend .flex;
	@extend .flex-col;
}

.flex-vb {
	@extend .flex-v;
	@extend .justif-between;
}

.flex-e {
	@extend .flex;
	@extend .justify-end;
}